Jade is usually dark green and may consist of two different minerals. There is nephrite jade, which is a amphibole minerla and jadeite, which is a pyroxene mineral. These two minerals are almost identical, which just minor structural differences. They are formed from the metamorphism of rocks rich in magnesium and iron, associated with the oceanic crust and the mantle below the crust. These rocks are pushed up onto the continent when two plates come together in subduction, where the oceanic plate sinks under the continental plate. Some of the plate gets scraped off and pushed up onto the continent. Magnetite forms as a heavy mineral cumulate in iron and magnesium rich magma. It separates from the rest of the magma in a layer. When metamorphosed, the surrounding rock turns to jade but the magnetite does not metamorphose. Magnetite is a metallic mineral and is magnetic.
Please enlarge and view the photographs for more detailed views. Shown wet to simulate polish. As with all natural rock, there may be fractures or pits to seal or work around. Each slab has the approximate dimensions listed. I use the longest and widest point and the thinnest, it’s not averaged.
We have worked hard with the lighting and the settings on the camera so that the colors are very accurate. Individual settings may affect color viewing on various devices and I cannot predict what your device will do, but on my Macbook Pro, they’re dead on for color. I appreciate your business!